CN211525196U - Noise reduction assembly and electrical device - Google Patents
Noise reduction assembly and electrical device Download PDFInfo
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- CN211525196U CN211525196U CN201920965999.1U CN201920965999U CN211525196U CN 211525196 U CN211525196 U CN 211525196U CN 201920965999 U CN201920965999 U CN 201920965999U CN 211525196 U CN211525196 U CN 211525196U
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Abstract
The utility model discloses an electrical apparatus of subassembly and this use of making an uproar falls in falling falls in the subassembly. This noise reduction assembly includes: the gas-liquid separator comprises a shell (1) and a cavity (2) positioned in the shell (1), wherein the cavity (2) comprises an inlet (3), an outlet (4) and an expansion cavity (5) positioned between the inlet (3) and the outlet (4), the sectional area of any position of the expansion cavity (5) is larger than that of the inlet (3), the sectional area of the outlet (4) is larger than or equal to that of the inlet (3), and the sectional area is the sectional area of the cavity (2) perpendicular to the gas flow direction. The noise reduction assembly can effectively reduce the noise of an electrical device.
Description
Technical Field
The utility model belongs to the technical field of domestic appliance, concretely relates to subassembly and electrical apparatus of making an uproar falls.
Background
At present, people pay more and more attention to noise of household appliances in home life, and in order to improve life quality, people generally expect that the noise of the household appliances is as small as possible. Because of the specific requirements of the working environment of the sweeping robot, how to reduce the fan noise generated by the high-speed fan of the sweeping robot is a key point and a difficult point in the design of the sweeping robot, and therefore, no effective method is available for reducing the noise. When the motor of the sweeping robot fan runs at a high speed (nearly 6000r/min), the combination of air and dust (or other tiny garbage) is sucked into the filtering system through the fan, then the air is exhausted at a high speed, and the high-speed flow of the airflow can generate high air noise.
Patent application CN105212833 discloses a robot cleaner with music playing function, which plays a specific music through a speaker to mask the noise of a fan, and does not substantially reduce the noise of the fan.
At present, a method for effectively reducing the noise of a sweeping robot is urgently needed, the trouble brought to a user by the noise is fundamentally solved, and the life quality of the robot is improved.
SUMMERY OF THE UTILITY MODEL
As according to the utility model discloses an aspect, the embodiment of the utility model provides a subassembly of making an uproar falls, include: the cavity comprises an inlet, an outlet and an expansion cavity positioned between the inlet and the outlet, the sectional area of any position of the expansion cavity is larger than that of the inlet, the sectional area of the outlet is larger than or equal to that of the inlet, and the sectional area is the sectional area of the cavity perpendicular to the airflow direction.
In some embodiments, the cross-sectional area of the expansion chamber transitions smoothly from one end connected to the inlet to a maximum and to the other end connected to the outlet.
In some embodiments, the cross-sectional area of the expansion chamber transitions directly from one end connected to the inlet to a maximum and to the other end to the cross-sectional area of the outlet.
In some embodiments, the ratio of the maximum cross-sectional area of the expansion chamber to the cross-sectional area of the inlet is 1.5:1 to 10: 1.
In some embodiments, the ratio of the maximum cross-sectional area of the expansion chamber to the cross-sectional area of the inlet is from 2:1 to 4:1.
In some embodiments, the inlet, the outlet and the inner wall of the expansion chamber are at least partially coated with sound absorbing material, and the maximum sectional area of the sound absorbing material in the vertical direction of the airflow accounts for no more than 50% of the sectional area of the expansion chamber at the corresponding position.
In some embodiments, a baffle plate with through holes is arranged in the expansion chamber along the direction perpendicular to the airflow direction, so that air can only pass through the through holes, and the area of the through holes is not smaller than the cross-sectional area of the inlet.
In some embodiments, the interior walls of the cavity are entirely coated with sound absorbing material.
In some embodiments, the sound absorbing material is at least partially fixedly attached to the interior wall of the expansion chamber.
In some embodiments, the sound absorbing material is selected from one or both of the following materials: porous sound-absorbing materials and fiber sound-absorbing materials.
In some embodiments, the porous sound absorbing material is selected from one or both of the following materials: polyurethane open-cell foam and foamed aluminum.
In some embodiments, the fibrous sound absorbing material is selected from one or more of the following: polypropylene fibers, polyethylene fibers, blends of polyethylene fibers and polypropylene fibers, glass fibers. The utility model discloses among the noise reduction assembly, when the sound wave got into the great inflation chamber of interior sectional area via the entry, reached the effect of "anti" nature noise elimination, the noise was reduced, realized falling the function of making an uproar.
As another aspect of the utility model, the embodiment of the utility model provides a household appliance, the subassembly of making an uproar falls including fan and the arbitrary embodiment of the aforesaid, falls the subassembly of making an uproar and connects in the fan exit.
In some embodiments, the electrical device is a sweeping robot, a vacuum cleaner.
The utility model discloses domestic appliance has increased the subassembly of making an uproar that falls of special design for the air current that the fan came out has experienced "anti" nature and has "hindered" nature noise elimination's process even through should making an uproar the subassembly of making an uproar, thereby makes domestic appliance's noise obtain subducing of certain degree.
Drawings
Fig. 1 is a schematic view of a noise reduction assembly connected to a fan according to an embodiment of the present invention;
FIG. 2 is a cross-sectional structural view of a longitudinal cross-section of a noise reduction assembly along an airflow direction according to another embodiment of the present invention;
FIG. 3 is a cross-sectional structural view of a longitudinal cross-section of a noise reduction assembly along an airflow direction according to another embodiment of the present invention;
FIG. 4 is a cross-sectional structural view of a longitudinal cross-section of a noise reduction assembly along an airflow direction according to an embodiment of the present invention;
wherein the reference numerals are:
1. the air conditioner comprises a shell, 2, a cavity, 3, an inlet, 4, an outlet, 5, an expansion cavity, 6, sound absorption materials, 7, a partition board, 8, a fan, 9, airflow, 10 and a fan air outlet.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the embodiments of the present invention, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings and the detailed description.
Interpretation of terms
In the present application, unless otherwise specified, the meaning of each technical term is as follows:
the airflow direction 9 is a direction in which, when the fan works, airflow enters the inlet 3 of the noise reduction assembly from the fan air outlet 10, passes through the expansion cavity 5, and finally flows out from the outlet 4 of the noise reduction assembly.
The axial direction means a direction of a central axis of a structure having a shape of the central axis as a whole (e.g., a structure of a hollow quadrangular prism or a hollow cylinder as a whole), and the axial direction is an air flow direction in the present invention.
The cross-sectional area of the inlet, outlet or expansion chamber refers to the cross-sectional area of the chamber body at the inlet, outlet or expansion chamber of the noise reduction assembly along a cross-section perpendicular to the direction of the gas flow,
"A is B in its entirety" or "A is essentially B", which means that A conforms to feature B on a larger scale, but does not represent that its details must completely conform to feature B; for example, a is a cylinder as a whole, meaning that the macroscopic shape of a is a cylinder, but there may be some detailed structures such as grooves, protrusions, etc. that are small relative to the overall size of the cylinder.
"A equals B" or "A equals B" means that A and B are approximately equal in size or magnitude, but does not mean that A and B must be exactly equal.
Noise reduction assembly
The embodiment of the utility model provides a noise reduction assembly.
As shown in fig. 1, the utility model discloses the subassembly of making an uproar falls links to each other with fan air outlet 10, and the entry 3 and the fan air outlet 10 accordant connection of subassembly of should making an uproar falls.
As shown in fig. 2, the utility model discloses noise reduction assembly of embodiment includes: the gas flow path comprises a shell 1 and a cavity 2 positioned in the shell 1, wherein the cavity 2 comprises an inlet 3, an outlet 4 and an expansion cavity 5 positioned between the inlet 3 and the outlet 4, the cross-sectional area of any position of the expansion cavity 5 is larger than that of the inlet 3, the cross-sectional area of the outlet 4 is larger than or equal to that of the inlet 3, and the cross-sectional area is the cross-sectional area of the cavity 2 perpendicular to the gas flow direction.
The shapes of the external cross sections of the inlet 3, the outlet 4 and the expansion cavity 5 are not particularly limited, and may be circular, oval, square, rectangular or other polygons, as long as the inlet is connected with the fan outlet 10 in a matching manner, and circular, square and rectangular shapes are preferred. The shapes of the inner cross-sections of the inlet 3, the outlet 4 and the expansion chamber 5 are also not particularly limited, and are preferably circular, square and rectangular.
The lengths of the inlet 3 and the outlet 4 are also not particularly limited.
The cross-sectional area of the outlet 4 should be greater than or equal to the cross-sectional area of the inlet 3, and the noise reduction effect is better when the cross-sectional areas of the inlet 3 and the outlet 4 are the same. When the sectional area of the inlet 3 is smaller than that of the outlet 4, the pressure loss between the inlet 3 and the outlet 4 is increased, the energy consumption of the fan 8 is increased, and the working efficiency of the fan is reduced.
The cross-sectional area of the expansion chamber 5 at any position perpendicular to the airflow direction needs to be larger than that of the inlet 3, and the shape of the expansion chamber in the airflow direction is not particularly limited, and preferably, the expansion chamber can be a curved olive shape with two thin ends and a thick middle as shown in fig. 2 and 3, or two opposite curved cone bodies sharing the bottom surface, as long as the cross-sectional area of the expansion chamber 5 is ensured to be smoothly increased from the inlet 3 to the maximum and then gradually decreased to the outlet 4; as shown in fig. 4, the expansion chamber 5 may also be a curved cylinder, such as a cylinder, a quadrangular prism, a triangular prism, etc., as long as the sectional area of the expansion chamber 5 is always larger than that of the inlet 3, and in this case, the sectional area of the expansion chamber 5 may be kept substantially constant or may be smaller at the two ends and larger in the middle. The ratio of the maximum cross-sectional area of the expansion chamber 5 to the inlet 3 is preferably 1.5:1 to 10:1, more preferably 2:1 to 4:1.
The expansion chamber 5 is formed integrally or by two or more parts along the axial direction, and then the two or more parts are connected in a sealing manner to form the expansion chamber, so that the air flow and the sound wave cannot leak from the connection after the connection is completed, and the sealing connection manner can be a common mechanical connection manner, such as bonding, riveting or welding. When the expansion cavity is formed in a split mode, required parts can be further placed in the expansion cavity conveniently.
The inlet 3, the outlet 4 and the expansion cavity 5 may be integrally formed, or may be formed separately as shown in fig. 4, during the separate forming, the inlet 3, the outlet 4 and the expansion cavity 5 need to be linked in a sealing manner, so that the airflow and the sound wave do not leak from the joint after the linking is completed, and the sealing and linking manner may be a common mechanical linking manner, such as bonding, riveting or welding.
The sound absorption materials 6 are partially or completely attached to the inner walls of the inlet 3, the outlet 4 and the expansion cavity 5, the attachment mode can be any link mode, such as bonding, riveting, welding, hasp mode or screw fixing link, the sound absorption materials 6 are completely attached as shown in fig. 2, the sound absorption materials 6 are attached to only the expansion cavity 5 and the outlet 4 as shown in fig. 3, the sound absorption materials are completely attached to only the expansion cavity 5 as shown in fig. 4, and the sound absorption materials 6 can be partially attached to the inside of the expansion cavity 5. The proportion of the maximum sectional area of the attached sound absorption material 6 in the vertical direction of the airflow to the sectional area of the corresponding position of the expansion cavity 5 is not more than 50%, preferably 10% -50%, and most preferably 50%. When the proportion of the sectional area of the sound absorption material 6 in the sectional area of the expansion cavity 5 is more than 50%, the pressure loss between the inlet 3 and the outlet 4 is increased, the energy consumption of the fan 8 is increased, and the working efficiency is reduced.
The sound absorbing material 6 may be any sound absorbing material, such as porous type sound absorbing material or fiber type sound absorbing material, and the porous type sound absorbing material is selected from one or two of the following materials: polyurethane open-cell foam and foamed aluminum; the fiber-based sound absorbing material is selected from one or more of the following materials: polypropylene fibers, polyethylene fibers, blends of polyethylene fibers and polypropylene fibers, glass fibers.
As shown in fig. 3, a partition plate 7 with a through hole is arranged in the expansion chamber 5 along a direction perpendicular to the airflow direction, so that air can only pass through the through hole, the area of the through hole is not smaller than the sectional area of the inlet 3, otherwise the sound absorption effect is affected, and the partition plate 7 and the expansion chamber 5 are integrally formed or separately formed and hermetically linked in a common mechanical linking manner. One end of the sound absorption material 6 is arranged at the partition board 7, the partition board 7 can be used for positioning the sound absorption material 6, the structural stability of the sound absorption material 6 when being impacted by airflow generated by the fan 8 is ensured, the position of the partition board 7 can be determined according to the pasting covering amount and the pasting covering mode of the sound absorption material 6, and the sound absorption material can be located at any position of the expansion cavity 5 theoretically.
Electrical appliance
The embodiment of the utility model provides an electrical apparatus who makes an uproar subassembly falls more than using.
As shown in fig. 1, the utility model discloses electrical apparatus, the subassembly of making an uproar is fallen and is connected fan export 10 department, and during operation, air current 9 and sound wave follow fan export 10 gets into the subassembly entry 3 of making an uproar falls, flows through inflation chamber 5 and the subassembly export 4 of making an uproar falls, flows out from electrical apparatus's export at last.
The electric appliance device is a sweeping robot or a dust collector. The fan is typically a high speed fan.
As shown in table 1, front and rear comparative data using a noise reduction assembly with a 2:1 ratio of the maximum cross-sectional area of the expansion chamber 5 to the cross-sectional area of the inlet 3 are shown and tested at five test points, front, rear, left, right, and top, respectively, of the sweeping robot. It is thus clear that, through using the embodiment of the utility model provides a fall the subassembly of making an uproar, fall 4.3dB of making an uproar on average to sweeping the floor robot.
TABLE 1
The utility model provides a plurality of preferred embodiments about falling subassembly and electrical apparatus of making an uproar.
a housing (1) for a motor vehicle,
and a cavity 2 positioned in the shell 1, wherein the cavity 2 comprises an inlet 3, an outlet 4 and an expansion cavity 5 positioned between the inlet 3 and the outlet 4, the cross-sectional area of any position of the expansion cavity 5 is larger than that of the inlet 3, the cross-sectional area of the outlet 4 is larger than or equal to that of the inlet 3, and the cross-sectional areas of the inlet 3, the outlet 4 and the expansion cavity 5 are the cross-sectional areas of the cavity 2 at the corresponding positions, which are basically vertical to the airflow direction.
Preferred embodiment 8 is a noise reduction assembly as described in any of preferred embodiments 1-7 wherein the sound absorbing material 6 is applied to the entire inner wall of the chamber 2.
Preferred embodiment 9 is a noise reduction assembly as set forth in preferred embodiment 8 wherein said sound absorbing material 6 is at least partially fixedly attached to the interior walls of said expansion chamber 5.
Preferred embodiment 11 is a noise reduction assembly as described in preferred embodiment 10, said porous sound absorbing material being selected from one or both of the following materials: polyurethane open-cell foam and foamed aluminum.
Preferred embodiment 12 is a noise reduction assembly as described in preferred embodiment 10, said fibrous sound absorbing material being selected from one or more of the following: polypropylene fibers, polyethylene fibers, blends of polyethylene fibers and polypropylene fibers, glass fibers.
Preferred embodiment 13 is an electrical device comprising a fan 8, and a noise reduction assembly as set forth in any of preferred embodiments 1-12 connected at the fan outlet 10.
Preferred embodiment 14 is the electric apparatus of preferred embodiment 13, wherein the electric apparatus is a sweeping robot or a vacuum cleaner.
It is to be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the embodiments of the present invention, and the embodiments of the present invention are not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the embodiments of the invention, and these modifications and improvements are also considered to be within the scope of the embodiments of the invention.
Claims (11)
1. A noise reduction assembly, comprising:
a shell (1) is arranged in the shell,
and the cavity (2) is positioned in the shell (1), the cavity (2) comprises an inlet (3), an outlet (4) and an expansion cavity (5) positioned between the inlet (3) and the outlet (4), the sectional areas of the inlet (3), the outlet (4) and the expansion cavity (5) are the sectional areas of the cavity (2) at the corresponding positions in the direction basically perpendicular to the airflow direction, the sectional area of any position of the expansion cavity (5) is larger than that of the inlet (3), and the sectional area of the outlet (4) is larger than or equal to that of the inlet (3).
2. Noise reduction assembly according to claim 1, characterized in that the cross-sectional area of the expansion chamber (5) transitions smoothly from one end connected to the inlet (3) to a maximum and to the other end connected to the outlet (4).
3. Noise reduction assembly according to claim 1, characterized in that the cross-sectional area of the expansion chamber (5) transitions directly from one end in connection with the inlet (3) to a maximum and to the other end to the cross-sectional area of the outlet (4).
4. The noise reduction assembly according to claim 1, characterized in that the ratio of the maximum cross-sectional area of the expansion chamber (5) to the cross-sectional area of the inlet (3) is 1.5:1 to 10: 1.
5. The noise reduction assembly according to claim 1, characterized in that the ratio of the maximum cross-sectional area of the expansion chamber (5) to the cross-sectional area of the inlet (3) is 2:1 to 4:1.
6. A noise reduction assembly according to any of claims 1-5, characterized in that the inlet (3), the outlet (4) and the inner wall of the expansion chamber (5) are at least partly coated with a sound-absorbing material (6), the sound-absorbing material (6) having a maximum cross-sectional area in the direction perpendicular to the air flow which accounts for no more than 50% of the cross-sectional area of the expansion chamber (5) at the respective location.
7. Noise reduction assembly according to claim 6, characterized in that a baffle plate (7) with through holes is arranged in the expansion chamber (5) in a direction perpendicular to the air flow, so that air can only pass through the through holes, the area of the through holes being not smaller than the cross-sectional area of the inlet (3).
8. Noise reduction assembly according to claim 6, characterized in that the inner wall of the cavity (2) is entirely coated with sound absorbing material (6).
9. Noise reduction assembly according to claim 6, characterized in that the sound-absorbing material (6) is at least partly fixedly attached to the inner wall of the expansion chamber (5).
10. Electrical appliance, characterized in that it comprises a fan (8), and a noise reducing assembly according to any one of claims 1 to 9, connected at the fan outlet (10).
11. The electrical apparatus of claim 10, wherein the electrical apparatus is a sweeping robot or a vacuum cleaner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920965999.1U CN211525196U (en) | 2019-06-25 | 2019-06-25 | Noise reduction assembly and electrical device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920965999.1U CN211525196U (en) | 2019-06-25 | 2019-06-25 | Noise reduction assembly and electrical device |
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| CN211525196U true CN211525196U (en) | 2020-09-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118203A (en) * | 2019-06-25 | 2019-08-13 | 明尼苏达矿业制造特殊材料（上海）有限公司 | A kind of noise reduction components |
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- 2019-06-25 CN CN201920965999.1U patent/CN211525196U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118203A (en) * | 2019-06-25 | 2019-08-13 | 明尼苏达矿业制造特殊材料（上海）有限公司 | A kind of noise reduction components |
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